ETL testing is a data-centric testing process to prove that the data has been transformed and loaded into the target as expected. ETL stands for extract, transform, and load. ETL testing is doing to ensure that the data that has been loaded from a source to the landing-place after business transformation is precise.
ETL Testing Automation
Extract, transform and load (ETL) Testing Automation is mostly done using SQL scripts and gathering the data in spreadsheets. This approach to performing ETL testing is very slow and time-consuming, error-prone, and is performed on sample data. ETL Testing Automation is the most critical and time-consuming part of data warehousing.
Turning data into useful information is a vital process to get the right business insights. But even before that data must be procured, stored and tested in the right manner. Any discrepancy in data stems from errors in the ETL process, in turn making it hard to derive insights.